A professor is teaching three sections of the same course and wants to determine if the...
A professor is teaching three sections of the same course and wants to determine if the proportion of students who passed is statistically different across the classes. The table below reports how many students in each section passed and how many were enrolled:
| Section | Passed | Enrolled |
| 24987 | 77 | 108 |
| 24988 | 78 | 104 |
| 24989 | 80 | 106 |
Conduct the chi-square test and report the final test statistic.
Homework Answers
The statistical software output for this problem is:
From above output:
Chi square test statistic = 0.088
Add Answer to:
A professor is
teaching three sections of the same course and wants to determine
if the...
Question 6. An instructor is teaching three sections of the same course this term. There are,...
Question 6. An instructor is teaching three sections of the same course this term. There are, in sections 1,2 and 3 respectively, 24, 28 and 32 people. They take an SRS sample from each section and obtain the following grades and genders in brackets: Section 1 2 3 Grades 81 (Male) 42 (Male) 55 (Female) 78 (Female) 66 (Female) 78 (Male) 65 (Male) 79 (Male) 95 (Male) Part A. Build a 95% confidence interval for section 2. Part B. Build...
Problem #5. James and Walter were teaching different sections of the same course. When the course was completed, they compared the grades they gave to see whether their distributions of grades we...
Problem #5. James and Walter were teaching different sections of the same course. When the course was completed, they compared the grades they gave to see whether their distributions of grades were essentially the same D & F James Walter 15 27 21 16 24 Use a chi-squared Test (with the level of significance α-Ο 01) to see whether the difference is significant.
Problem #5. James and Walter were teaching different sections of the same course. When the course was...
The average test score for the statistics course is 81%. A professor wants to see if...
The average test score for the statistics course is 81%. A professor wants to see if the average test score for students who are given colored pens on the first day of class is different. The test scores for the 12 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 82, 59, 64, 78, 66, 73, 79, 61, 65, 54, 85, 58 What can be concluded at the...
A professor teaches two sections of an introductory statistics course. He gives each section the same...
A professor teaches two sections of an introductory statistics course. He gives each section the same final and wonders if any significant differences exist between the medians of these sections. He draws a sample of seven scores from Section A and six scores from Section B. Section A Section B 75 62 87 93 74 7765 64 95 72 7885 80 Cli Click here for the Excel Data File o. Set up the hypotheses to test the claim that the...
The average final exam score for the statistics course is 77%. A professor wants to see...
The average final exam score for the statistics course is 77%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is lower. The final exam scores for the 12 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 79.65, 57. 72. 84. 54,60,69.69.85,58,79 What can be concluded at the the a = 0.05...
1. A mathematics professor believes that the performance of students taking an elementary calculus course has declined in recent years. The professor decides to reuse a final exam that was first admin...
1. A mathematics professor believes that the performance of students taking an elementary calculus course has declined in recent years. The professor decides to reuse a final exam that was first administered 10 years ago. At that time the mean score was 81 with s=10, for the 50 students in the section taught by that professor When given to the current class of 53 students, who observed essentially the same set of lectures, the mean is 75 with s=15. If...
Easier Professor - Significance Test (Raw Data, Software Required): Next term, there are two sections of...
Easier Professor - Significance Test (Raw Data, Software Required): Next term, there are two sections of STAT 260 - Research Methods being offered. One is taught by Professor Smith and the other by Professor Jones. Last term, the class average from Professor Smith's section was higher. You want to test whether or not this difference is significant. A significant difference is one that is not likely to be a result of random variation. The scores from last year's classes are...
The owner of a golf course wants to determine if his golf course is more difficult...
The owner of a golf course wants to determine if his golf course is more difficult than the one his friend owns. He has 11 golfers play a round of 18 holes on his golf course and records their scores. Later that week, he has the same 11 golfers play a round of golf on his friend's course and records their scores again. The average difference in the scores (treated as the scores on his course - the scores on...
The average final exam score for the statistics course is 75%. A professor wants to see...
The average final exam score for the statistics course is 75%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is higher. The final exam scores for the 16 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 82, 73, 89, 67, 89, 74, 98, 68, 73, 65, 97, 77, 74, 76, 73,...
Question 6. An instructor is teaching three sections of the same course this term. There are, in sections 1,2 and 3 respectively, 24, 28 and 32 people. They take an SRS sample from each section and obtain the following grades and genders in brackets: Section 1 2 3 Grades 81 (Male) 42 (Male) 55 (Female) 78 (Female) 66 (Female) 78 (Male) 65 (Male) 79 (Male) 95 (Male) Part A. Build a 95% confidence interval for section 2. Part B. Build...
Problem #5. James and Walter were teaching different sections of the same course. When the course was completed, they compared the grades they gave to see whether their distributions of grades were essentially the same D & F James Walter 15 27 21 16 24 Use a chi-squared Test (with the level of significance α-Ο 01) to see whether the difference is significant.
Problem #5. James and Walter were teaching different sections of the same course. When the course was...
A professor teaches two sections of an introductory statistics course. He gives each section the same final and wonders if any significant differences exist between the medians of these sections. He draws a sample of seven scores from Section A and six scores from Section B. Section A Section B 75 62 87 93 74 7765 64 95 72 7885 80 Cli Click here for the Excel Data File o. Set up the hypotheses to test the claim that the...
The average final exam score for the statistics course is 77%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is lower. The final exam scores for the 12 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 79.65, 57. 72. 84. 54,60,69.69.85,58,79 What can be concluded at the the a = 0.05...
The average final exam score for the statistics course is 75%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is higher. The final exam scores for the 16 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 82, 73, 89, 67, 89, 74, 98, 68, 73, 65, 97, 77, 74, 76, 73,...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago